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  <meta name="Generator" content="EditPlus®">
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  <title>超链接下划线</title>
  <style>
	a{color:black;font-size:12px;text-decoration:none;}
	a:hover{color:red;text-decoration:underline;}
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	<a href="">我是一个a标签，悬浮字体变红并添加下划线</a>
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